AJTMH HINARI
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Am. J. Trop. Med. Hyg., 49(1), 1993, pp. 30-37
Copyright © 1993 by The American Society of Tropical Medicine and Hygiene

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Marfin, A. A.
Right arrow Articles by Tsai, T. F.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Marfin, A. A.
Right arrow Articles by Tsai, T. F.
Right arrowPubmed/NCBI databases
*Substance via MeSH

Epidemiologic Aspects of a St. Louis Encephalitis Epidemic in Jefferson County Arkansas, 1991

Anthony A. Marfin, Daniel M. Bleed, John P. Lofgren, Annette C. Olin, Harry M. Savage, Gordon C. Smith, Patrick S. Moore, Nick Karabatsos AND Theodore F. Tsai
Division of Vector-Borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, Colorado; Arkansas Department of Health, Little Rock, Arkansas

In 1991, the first epidemic of St. Louis encephalitis (SLE) ever reported in Arkansas resulted in 25 cases in Pine Bluff (attack rate: 44 per 100,000; 95% confidence interval [CI] 28–65). To identify risk factors for SLE viral infection and risk factors for neuroinvasive illness, we conducted a community-based, cross-sectional study of noninfected and asymptomatically infected persons and a case-control study of asymptomatically and symptomatically infected persons. The SLE viral infection rate was similar in all age groups and in all studied census tracts. Risk factors for asymptomatic infection included: living in a low income household (relative risk [RR] = 2.6, 95% CI 1.1–6.0), sitting outside in the evening (RR = 2.1, 95% CI 1.0–4.8), and living in homes with porches (RR = 2.9, 95% CI 0.9–9.3) or near open storm drains (RR = 2.2, 95% CI 1.0–4.9). Compared with asymptomatically infected persons, symptomatic persons were older (odds ratio [OR] for age ≥ 55 years = 13.0, 95% CI 1.2–334) and more likely to have a previous history of hypertension (OR = 8.5, 95% CI 1.1–72). Our results indicate that advanced age is the most important risk factor for developing encephalitis after infection with SLE virus. Hypertension and vascular disease may predispose to neuroinvasive disease, but this epidemiologic study has not ruled out the confounding effects of age.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1993 by the American Society of Tropical Medicine and Hygiene.